Automatic gun



Sept. 12, 1933. A. PODRABSKY 1,926,816

AUTOMATIC GUN Filed Sept. 24, 1952 2 Sheets-Sheet 1 F ig.4.

INVENTOR BY @ziw m 8; ATTORNEY AUTOMATIC GUN Filed Sept. 24, 1932 2 Sheets-Sheet 2 J i ii I r I J0 l l I 1 x 47 54 6! Fig.4.

33 1-79.10. F7942. 11 5- 44. 4 4 w I.

lNVENT K.

4 ATTOKNEY Patented Sept lZt, a I

634,651, and

1931 v V V "1 I .15 Qlaims.

AUTOMA'liIC-GUN Z f Antonin Bodrab sky;BrunnfCzechosloiiakia, as V signorrto Czechoslovenska-Zbrojovka Akciova V Spolecnost YBrne,Brunn, lzechoslov akia i Application September 24,1932, Serial No. 3

in Czechoslovakia. ct'ober 21, g

' Figs..9 andlO showjdetails of the firingmecha The-present invention-relates to an automatic gun in which fixing meanfsare provided which:-

7 enable a catch, for ming part of the firing m'eohag nism, arranged for displacement in the path '01.

' movement of the breechv block mechanism-and adapted to co-operate therewith; to be fixed with-I out actuation of the trigger of the'gun.

According to a'furthen ifeatureof the invention, instead-of theoatch member. only, the whole firing mechanism maybe capable of adjustment and.

fixing relative to thebreech. block. The; disjplaceable arrangement and of the catch 2 memb rs)! the firing mechanism hy fixlng means affords certain advantages, particularly from the standpoint ofthe simplifiedconst'ruction .of the gun and the raising of. its reliability during op--; eration In particular it is possible 'for'this .rea- Son Qto mount the .j catch member orjithe firing. mechanism on a carrying rmember -mounted for" sliding movement longitudinally of the gun and to construct this carrying member, in addit on; 7 as the carrying member for the cooking mecha nismor as" the cover :for" the cartridge ejector separately on it. .1 J

opening,'or finally both ascarrier for the 'coclging I mechanism'a'nd also as cover for thecartridge;

. ejector o in u' inq dfnlylis, t

tion of the gun considerably simplified andfits reliability durin p a o dbfi particular. openings in'theg--. c a dl pensed with which would be necessary if the firing mechanismgr cocking mechanism and cartridge ejector cover of. the gun were arranged "In theaccompanying drawingsis-shown an 1 automatic gun as a iconstructiona'l example of the-invention, in which the firing'mechanismflhe cooking mechanism and the'cover for the car y tridg'eejector opening'ar'e on'one common'car In Figf'? is shown a section on the line VII- -VII of Fig. '5,'looking from-left torightjin' this f gure the switchover member tor firing single shots and for continuous fire is removed Iromits place." Fig; 8 shows a plan viewpf Fig. 5 or Fig. 6. I

,showniwith"thei-breechblock carrier 1.

lowhe'nthe breechblock has bee'n'cocked. The

. the whole'firing'rnechanismisdisplaceable with.

'm ni'A -"x 4 On the carrying-member 15" near the firing member l5. 23 and-24 are 'notcheswhich allowi nism in-the lockedpdsition.

Figs. 11 and 12 showthe same detailsdurin'g continuous fire, and- I Figs. B and "14 the same parts when firing venti on is concernedJTh'e: present invention is applicableto' guns ofall kinds no' matter how the breech block obtains its movement; As a;

constructionarexampl e of the invention a gun block-is'" unimportant sofar as the present'in 65.

is chosen' -for the drawings which hasa breech block carrier 1 and abreech block 2 adapted vto reciprocate towards a and away from the breech' 'block carrier. The actuationof the breech blockcarrier may beeffected. either'by means-of a gas" piston "workingina gasi pressure cylinder-or b$"7! 5;

means" of a'ilever arrangement' operated upon discharge orby similar. means. The breech block carrier "is mounted suitable} guides for slidingin'a'direction longitudinal of the gun, so that the els along the path 0f movementA A. 3v is the 1 barrel-of thegun-,"5 is' a casing attached to thebarrel; andjfi is a' fixed casing which encloses the whole breechblockmechanism a2. The most im' is" the catch 10l which cojoperates with apart of'the breech blo'ck mechanism; "in the exa'mplef' According to the invention this catch 10 canistic'positions of the catch lo. In Fig. '1 the catch" is in-the position of" rest. Fig. 2-shows thef'catch displaceable "catch can be coupled in' any way 7 with "any desired construction offiring mecha-f nism In the present; constructional example the catch urem a for thisvery purpose that the'firin'g mechanismy is mounted ona carrying- A 'member 1'5, whichis slidably arranged by means" of guide-bars .16 inguide-grooves 17; The guidegrooves 17 run parallel to the plane ofmoveg-ji mechanism 111; is also arranged the cooking mech-; anism 2;, this consists of-a handle 20' which'is pivotally mounted in an arm 21 of the -carrying' under surface 4 ?of the breech block carrier trav- 0 portant part of the firing mechanism yof the gun be idi's'placed parallel tb the path-of movement' {AfA-and can'be' retained'in t'he displaced'posi-- tion." In Fig's'. 1;and.2' are shown both'char'acter the catch is held in a: desired position without by theses-tin 44 since thj'reces s 42 is in the path of rotation-fofthepin 44; when the of thehandle 20.

switch over member is n the-position shownin Eig'lfl l-(see also the switch-"over member inthe same position iiiEFig'sf t and a). When the switch- -oyer member is injthe position shown in Fig. 14 the catchjum'ps back into' the retaining position as soon as the trigger button has been actuated, so that the breech, block is directly held in the cocked position. Thus firing of single shots is permitted.

The handle 20 serves firstly to cock block. But since the carryingmember, when in the cocked position, is held fast,'-relatively to the gun, against all relative 'movements, the whole gun can therefore also The same also applies to the other parts'ofthe gun according tQ -the present invention, which can-be alteredwithregard to their arrangement and constructional form within the scope of the V present invention. The onlyimportantpointis functionit is called upon to perform.

that the catch in thefiring mechanism, which co-operates with the breech block can at any rate be. so adjusted and so fixed with'regard to the breech block that the said catch when in the adjusted position can fully'carry out I claim: i r i 1. An automatic firearm comprising a barrel,

a breech casing, a breech block moving 'mecha-. nism adapted to makeslidingmovementswithin the" breech casing, firing mechanism including -a trigger, 'a. catch mounted jonthe firing mecha nism and adapted to co -operate with the breech block moving mechanismgmeans on" the firing v mechanism whereby the latter is moved together I J r with the breech block moving mechanism/to cock 45' the gun and fixing". means whereby the firing mechanism and breech block moving mechanism are held inthe cocked position without operation of the trigger.,

-2. An automatic firearm comprising "a barrel,

"a breech casing, a breech block moving mechanism adapted to make sliding movements within the breech casinggifiri'ng mechanism including a. trigger, a catch mounted on the firing mechanism and'adapted to co-operate with thebreech block moving mechanism, a handle pivotally mounted .on'one side and towards the rear of the firingmechanism whereby the latter is moved together with the breech block moving mechanism to cock the gun and fixing means whereby the firing mechanism and breech block moving mechanism are held in the cocked position, with-' out operation of the trigger.

3. An automatic firearm comprising a barrel,

a breech casing, a breechv block moving niecha nism adapted to make sliding movements within the'br'eech casing, a sliding carrier, firing mechanism mounted on the sliding carrier, a catch on thesliding carrier'adapted to co-operate with .the' breech block "moving -mechanism to deteroperable .to cook the gun, a trigger mounted .on

thesliding carrier in a position where it can be operated by the thumb of a hand grasping the cooking handle and fixing means whereby the breech be aimed by'means the 'operationof the trigger. 1w

' 4. An automatic firearm comprising j a barrel,

a breech casing, a breech block moving mechanismadapted to -make' sliding movements within the breech casing,'a sliding carriergfiring mechariisinmourited on the sliding carrier, a catch on the sliding carrier adapted to co-operate with the breechblock moving mechanism to determine theposition of the latter withregard to the sliding carrier, a'handle on the sliding carrier operable to cock the gun, a trigger mounted'on the sliding carrier in a. positionwhere it can 'be operated by the thumb of a hand grasping.

the cocking handle, a pivoted latch carried on the sliding carrier and a fixed stop co-operating with said latch to hold the catchin a desired position without operation of thetrigger and a handlefon the sliding carrier forreleasingflthe" latch from the fixed stop and arranged in a position where itis operable by the thumb of a hand grasping the. cockinghandle. 5. An automatic firearm comprising a movable breech block mechanism, firing and cooking mechanisms, a trigger, means for moving said firing mechanism in the direction'oi movement of the breech, block mechanism and a distance substantially equal to the displacementof said breech block mechanism, a catch on said firing mechanism cooperating with the breech block mechanism, and means independent of said trigcocked position.

' 6. An automatic firearm according to claim 5 andfcharacterize'd by a carrier for'said firing and cooking mechanisms, and means formounting said carrierto'be longitudinally displaced with respect. to said firearm.

'7. automatic firearm according to claim 5, characterized in that the firearm is provided with an opening for" the ejection of shells, a carrier for said firing mechanism, and means for slidably mounting said carrier on the firearm whereby in one position it covers and in another posi. tion it frees said opening. 1

. 8.;An automatic firearm according to claim 5, characterized in that said means for locking the gfiring mechanism comprises a movablestop carried by said breech block mechanism, and a stationary stop cooperating therewith mounted on' 9. An automatic firearm according to claim 5, characterized by a pivotal mounting for said catch, and means controlled by the firing mechanism for actuating said catch. r

10. An automatic firearm according to claim 5, characterized by a pivotal mounting for said catch, a control member for'actuating said catch, means controlled by the firing mechanism for operating said :control'member, and a switching,

member ior single shot and continuous firing cooperating with said last-mentioned means.

11. An automatic firearm according to .claim 5,. characterized by a trough-shaped housing enclosing-thefiring mechanism and said means for locking it.

12. An automatic firearm according'to claim 5,

characterizedby a carrier for said firing mech-.

anism, and a handle on said carrier. mine the;position of the latter with regard to the sliding carrier, a handle on the slidingcarrier 13. An automatic firearm according to claim 5,

characterize'd by a carrier forsaidfiring mechgerfor locking said firing mechanism in the, I

" means forlocking said firing .mec

sible to thejahumlcrcfi said hand.

, 15. An 'autQmatic-firearm according characterized by; a; cap ier -for: sa.id figi ng mech- .anism, meepns fcr cpp era ting said catch in re w ch 1 h is as es? sponse -t o the opening, and -mcans for operating the, locking means pf thefiring mechanism 1:; response to; thc closing movement of 'said i r- :to claim 5, 1 I 1 AfiTON N V PODRABSKY. 

